Tancredo is the canary in the coal mine, and he has performed a valuable role in this debate. It remains for some enterprising politician to listen to Tancredo's warning and take this issue to the White House in 2008. Allen might be the guy, but he is playing it a little too safe at this point. Newt might be the guy if he can overcome his baggage. We shall see.
Pence. I think Tancredo was a tad harsh on Pence's somewhat flawed compromise idea, but I think they can work together. Pence is the one to watch.
Pence would be an interesting choice as VP. My VP preference is someone like Giuliani, who is great at expressing himself in public, and who will inspire the entire spectrum of Republican voters. As a VP, he won't have to justify his past positions on social issues, he can just say that he will fully support the policies of the administration if they get elected. And he will.
Of course, another great choice for VP would be Condoleeza Rice. Wouldn't that be something? And it would give her 8 years of work in the political arena to allow her and us to figure out if she is right for the top spot.
George Allen is a "virtual fence" kinda guy.